Hemiepiphytic vine; internodes semiglossy, 3.5--4 cm long, ca. 1 cm diam., longer than broad, drying light brown, epidermis longitudinally deeply ridged, finely striate on magnification and densely granular to almost scabrous (but not harsh to the touch), the vestiture raised to ca. 1.5--2 times longer than wide; roots drying dark brown, <15 cm long, 1 mm diam., few per node; cataphylls 15 cm long, sharply 2-ribbed, (ribs low), green, deciduous. LEAVES with petioles 8--9 cm long, 7--8 mm diam., convex with acute margins adaxially, drying dark brown and somewhat sulcate adaxially with distinct acute marginal rib; sheath short, inconspicuous, 1--2 cm long, for <0.25 its petiole length; blades oblong-oblanceolate, acuminate at apex, weakly cordate at base, 19--28 cm long, 4--6 cm wide (3.8--4.7 times longer than wide), upper surface medium green, weakly glossy, drying dark brown, lower surface slightly paler, drying yellowish brown; midrib flat, concolorous above, convex, slightly paler than surface below; basal veins 1--2 per side, with 1--2 pairs free to base, indistinct; primary lateral veins 5--6-per side, weakly sunken above, convex, slightly paler than surface, drying paler below; minor veins moderately obsure, barely visible on drying, the larger weakly undulate, arising from the midrib only, secretory canals appearing on magnification as short, pale raphide cells along the minor veins. INFLORESCENCES (Post-Anthesis), 1 per axil; peduncle 10.5 cm long, 1 cm diam.; spathe to 15.7 cm long, to 7 cm wide when flat, weakly constricted above the tube, green throughout; spathe blade green inside with prominent striations from lower 1.5 cm to 9 cm up from base; spathe tube tinged red outside, red inside; fertile staminate portion to 5.5 cm long, 9 mm diam.; spadix with pistils 1.5--3 cm diam., drying light brown, sparsely granular on the sides; ovary 3--5-locular; ovules with 1 per locule, style similar to style type E; style funnel 0.5--0.7 mm, distinctly raised above the surface. INFRUCTESCENCE 10 cm long, 2.7 cm diam. in lower 1/3, prominently tapered toward apex to 1.3 cm diam. at apex; berries whitish; seeds oblong-elliptic, tan, smooth, 1.3--1.9 mm long.